Rubber Overmolding Services for Multi-Material Parts
What is Meant By Rubber Overmolding?
Rubber overmolding is an advanced procedure in which rubber or elastomers are molded over a base material, frequently thermoplastics or metals, to make bi-material or multi-material elements. This type of technology enhances grip, aesthetics, comfort, and functionality, besides the absence of secondary assembly.
Major benefits of overmolding are:
- Complex design overmolding, Multi-material.
- Ergonomic surfaces molded in soft-touch rubber.
- Bonding where the materials are in-molded to provide a seamless bond.
- Increased strength and chemical resistance.
- Dual-shot overmolding at high volume production at low costs.
In each product, SunOn is using the best comprehensive methods, such as thermoplastic elastomer (TPE) overmolding and silicone overmolding, to achieve maximum performance and reliability.
Rubber Overmolding: Multi-Material Manufacturing Advanced Solutions
- In the contemporary competitive world of manufacturing, rubber overmolding has become the key technology in developing soft-touch, ergonomic, and high-performance components. This process is also known as overmold rubber parts, rubber injection overmolding, or rubber overmold components, which enables to combination of rubber with other materials to create one functional and attractive product.
- SunOn provides custom overmolding services that are the most rigid to the stringent criteria of industrial requirements, to supply solutions to the automotive, medical, consumer electronics, and industrial markets.
Raw Materials in Rubber Overmolding
Rubber-to-plastic overmolding highly depends on the type of material used. SunOn deals with a great number of different materials and is flexible enough to address various needs.
Common Materials Include:
- Thermoplastics: ABS, PC, PP, due to structure and rigidity.
- Elastomers (TPE/TPU): Flexible and soft-touch applications.
- Silicone Rubber: Biocompatible, heat-resistant, for medical devices.
- Polyurethane (PU): Impact-resistant overmolds that are durable.
- Rubberized Surfaces: To achieve ergonomic grips and touch screens.
SunOn can achieve high adhesion between hard and soft materials using multi-shot molding with rubber, resulting in long-lasting and high-precision rubber overmolding in industries.

Overmolding of Rubber in Industry
Due to the versatility of the overmolding technology manufacturing with rubber, it can be used in a variety of industries:
- Automotive
Examples of automotive rubber overmold are grips, handles, gaskets, seals, vibration dampers, and soft-touch panels. The accuracy of the rubber overmolding to be used in SunOn provides high levels of durability and resistance to temperature and exposure to chemicals.
- Medical Devices
Overmolded items like seals, gaskets, tubing, and ergonomic grips made of medical rubber demand biocompatibility, accuracy, and repeatability. Silicone overmolding provides hygienic and safe components that can be used in a healthcare setting.
- Consumer Electronics
Rubber molding solutions have the advantage of providing better tactile feel, long-lasting functionality, and aesthetic appeal to soft-touch buttons, keypads, and the housings of wearable devices.
- Industrial Equipment
Custom overmolding service is widely used to create O-rings, diaphragms, vibration isolation pads, and protective housings that have been shown to perform well in harsh environments.
- Consumer Goods
Soft-touch rubber molding is applied to ergonomic grips on the tools used, protective covers, or kitchenware to increase usability and marketability.
Benefits of Rubber Overmolding
The advantages of using the services of a professional overmolding company include:
Design Flexibility
Enables complicated geometries, multi-material integration, and soft-touch surfaces.
Seamless Bonding
In-mold bonding is a bonding method that guarantees the long life of rubber and substrate materials.
Cost Efficiency
Lessens assembly processes, man-hours, and material wastage.
High Precision
Tight tolerance molding provides uniform dimensions on thousands of components.
Durability & Performance
Components have heat, chemical, abrasion, and wear resistance, therefore, increasing product life.
Customizable Solutions
SunOn offers OEM rubber overmolding and turnkey overmolding service to industrial and consumer customers.
Rubber Overmolding Technical Innovations
SunOn combines the latest technologies to provide high-quality rubber overmold products:
- Dual-Shot Overmolding: Inject two materials at a time to achieve a high level of adhesion.
- Bi-Material Injection Molding: Elastomers are mixed with hard materials.
- Silicone and TPE Over-Moulding: Provides chemical and temperature resistance.
- Overmold Design and Engineering: Supports complicated and ergonomic designs.
- Optimization of Cycle Time: Ensures effective and high-volume production.
These inventions enable SunOn to produce soft-touch ergonomic overmolded parts and individual overmolded rubber parts for industrial usage with unmatched precision.
Rubber Overmolding Process at SunOn
SunOn is precise at all levels, including design and production:
- Design & DFM Review
The next-generation software is used to study the design of components to make sure they are viable in being overmolded in rubber; that is, it is compatible with the substrate materials.
- Mold Making
Multi-cavity production and high quality are achieved by machining high-grade steel molds using precision tooling.
- Material Preparation
Silicone, TPE, and PU rubber materials are ready to be molded, and their hardness and quality are consistent.
- Mold Trials & Production
Trial runs check on the functionality of moulds, tight tolerance molding, and performance. Massive manufacturing is followed by post-processing like de-flashing, trimming, and curing.
Comparison of Rubber Overmolding and Other Processes
Rubber Overmoulding and Insert Molding:
In insert molding, a pre-shaped piece is put in the mold, in overmolding, a rubber is placed over an existing substrate, and adhesion is improved, and the surface feel is refined.
Comparison Between Overmolding and Traditional Molding:
Eliminates secondary assembly, enhances durability, and can be able to injection of mold using two materials with rubber, which improves the ergonomics and aesthetics.
Benefits:
- Low-cost, large-volume production.
- Favors complicated geometry shaping.
- Allows soft-touch buttons and keypads, and dual-material parts.
Why Rubber Overmolding with SunOn?
SunOn is known to be the finest manufacturer of molding, which offers:
- High level of rubber-to-plastic over-moulding solutions.
- The state-of-the-art optimization of overmolding.
- Plastic component overmolding service by rubber.
- Consumer electronics overmolding innovative soft-touch rubber.
- Ergonomic products in reliable bi-material overmolding.
In the case of SunOn, the clients can enjoy the benefits of full-service rubber molding, be it in rapid prototyping or in high-volume production, to provide high-quality, cost-effective, and innovative solutions. Get more information at SunOn silicone compression molding.
Conclusion
One of the groundbreaking technologies is rubber over molding; it integrates the ergonomics of soft touch, resilience, and aesthetics with multi-material components. When it comes to overmolding rubber products, SunOn can provide precision, reliability, and innovation when there is a need to have professional rubber overmolding services and custom overmolded rubber parts. Find out more about the ability of SunOn at SunOn Silicone Compression Molding.